Knife sharpener



FIG. 1 is a top plan view of a knife sharpener showing our new design.

FIG. 2 is a right side elevational view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a left side elevational view thereof.

FIG.5 is an end elevational view taken from line 5--5 of FIG. 1.

FIG. 6 is a sectional view taken along line 6--6 of FIG. 3.

FIG. 7 is an end elevational view taken from line 7--7 of FIG. 3.

FIG. 8 is a sectional view taken along line 8--8 of FIG. 1.

The ornamental design for a knife sharpener, as shown.